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Finding the Fourth Proportional to 123,878.96, 170,953.32 and 67,289.12

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Solution

The fourth proportional to 123,878.96, 170,953.32 and 67,289.12 is: 92,859.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,878.96 : 170,953.32 = 67,289.12 : x
  2. Step 2: Convert to fraction form
    123,878.96/170,953.32 = 67,289.12/x
  3. Step 3: Cross multiply
    123,878.96x = 170,953.32 × 67,289.12
  4. Step 4: Simplify right side
    123,878.96x = 11,503,298,463.88
  5. Step 5: Solve for x
    x = 11,503,298,463.88/123,878.96
  6. Step 6: Final answer
    x = 92,859.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.